package com.jshare.dao.Impl;
// default package

import java.sql.SQLException;
import java.util.List;

import org.hibernate.HibernateException;
import org.hibernate.LockMode;
import org.hibernate.Query;
import org.hibernate.Session;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.orm.hibernate3.HibernateCallback;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import com.jshare.dao.NewsDAO;
import com.jshare.entity.News;

/**
 	* A data access object (DAO) providing persistence and search support for News entities.
 			* Transaction control of the save(), update() and delete() operations 
		can directly support Spring container-managed transactions or they can be augmented	to handle user-managed Spring transactions. 
		Each of these methods provides additional information for how to configure it for the desired type of transaction control. 	
	 * @see .News
  * @author MyEclipse Persistence Tools 
 */

public class NewsDaoImpl extends HibernateDaoSupport implements NewsDAO  {
	     private static final Logger log = LoggerFactory.getLogger(NewsDaoImpl.class);
		protected void initDao() {
		//do nothing
	}
    
    /* (non-Javadoc)
	 * @see com.jshare.action.NewsDAO#save(com.jshare.entity.News)
	 */
    public void save(News transientInstance) {
        log.debug("saving News instance");
        try {
            getHibernateTemplate().save(transientInstance);
            log.debug("save successful");
        } catch (RuntimeException re) {
            log.error("save failed", re);
            throw re;
        }
    }
    
	/* (non-Javadoc)
	 * @see com.jshare.action.NewsDAO#delete(com.jshare.entity.News)
	 */
	public void delete(News persistentInstance) {
        log.debug("deleting News instance");
        try {
            getHibernateTemplate().delete(persistentInstance);
            log.debug("delete successful");
        } catch (RuntimeException re) {
            log.error("delete failed", re);
            throw re;
        }
    }
    
    /* (non-Javadoc)
	 * @see com.jshare.action.NewsDAO#findById(java.lang.Integer)
	 */
    public News findById( java.lang.Integer id) {
        log.debug("getting News instance with id: " + id);
        try {
            News instance = (News) getHibernateTemplate()
                    .get(News.class, id);
            return instance;
        } catch (RuntimeException re) {
            log.error("get failed", re);
            throw re;
        }
    }
    
    
    /* (non-Javadoc)
	 * @see com.jshare.action.NewsDAO#findByExample(com.jshare.entity.News)
	 */
    public List findByExample(News instance) {
        log.debug("finding News instance by example");
        try {
            List results = getHibernateTemplate().findByExample(instance);
            log.debug("find by example successful, result size: " + results.size());
            return results;
        } catch (RuntimeException re) {
            log.error("find by example failed", re);
            throw re;
        }
    }    
    
    /* (non-Javadoc)
	 * @see com.jshare.action.NewsDAO#findByProperty(java.lang.String, java.lang.Object)
	 */
    public List findByProperty(String propertyName, Object value) {
      log.debug("finding News instance with property: " + propertyName
            + ", value: " + value);
      try {
         String queryString = "from News as model where model." 
         						+ propertyName + "= ?";
		 return getHibernateTemplate().find(queryString, value);
      } catch (RuntimeException re) {
         log.error("find by property name failed", re);
         throw re;
      }
	}

	/* (non-Javadoc)
	 * @see com.jshare.action.NewsDAO#findByTitle(java.lang.Object)
	 */
	public List findByTitle(Object title
	) {
		return findByProperty(TITLE, title
		);
	}
	
	/* (non-Javadoc)
	 * @see com.jshare.action.NewsDAO#findByContent(java.lang.Object)
	 */
	public List findByContent(Object content
	) {
		return findByProperty(CONTENT, content
		);
	}
	
	/* (non-Javadoc)
	 * @see com.jshare.action.NewsDAO#findByAuthor(java.lang.Object)
	 */
	public List findByAuthor(Object author
	) {
		return findByProperty(AUTHOR, author
		);
	}
	
	/* (non-Javadoc)
	 * @see com.jshare.action.NewsDAO#findByFrom(java.lang.Object)
	 */
	public List findByFrom(Object from
	) {
		return findByProperty(FROM, from
		);
	}
	

	/* (non-Javadoc)
	 * @see com.jshare.action.NewsDAO#findAll()
	 */
	public List findAll() {
		log.debug("finding all News instances");
		try {
			String queryString = "from News";
		 	return getHibernateTemplate().find(queryString);
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}
	
    /* (non-Javadoc)
	 * @see com.jshare.action.NewsDAO#merge(com.jshare.entity.News)
	 */
    public News merge(News detachedInstance) {
        log.debug("merging News instance");
        try {
            News result = (News) getHibernateTemplate()
                    .merge(detachedInstance);
            log.debug("merge successful");
            return result;
        } catch (RuntimeException re) {
            log.error("merge failed", re);
            throw re;
        }
    }

    /* (non-Javadoc)
	 * @see com.jshare.action.NewsDAO#attachDirty(com.jshare.entity.News)
	 */
    public void attachDirty(News instance) {
        log.debug("attaching dirty News instance");
        try {
            getHibernateTemplate().saveOrUpdate(instance);
            log.debug("attach successful");
        } catch (RuntimeException re) {
            log.error("attach failed", re);
            throw re;
        }
    }
    
    /* (non-Javadoc)
	 * @see com.jshare.action.NewsDAO#attachClean(com.jshare.entity.News)
	 */
    public void attachClean(News instance) {
        log.debug("attaching clean News instance");
        try {
            getHibernateTemplate().lock(instance, LockMode.NONE);
            log.debug("attach successful");
        } catch (RuntimeException re) {
            log.error("attach failed", re);
            throw re;
        }
    }

	public static NewsDAO getFromApplicationContext(ApplicationContext ctx) {
    	return (NewsDAO) ctx.getBean("NewsDAO");
	}
	
	//分页显示
	public  List getPage(String sql,int  firstRow,int  maxRow) {
	               //String queryString = "from Product";
	   //String sql="from Product";
	   Query q  =  this.getSessionFactory().getCurrentSession().createQuery(sql);
	   q.setFirstResult(firstRow);
	   q.setMaxResults(maxRow);
	   return  q.list();	    
	}
	//获取记录的总数
	public int getTotalRows(String sql)//添加sql 语句是为了实现条件查询
	{
		//String hql = "select count(*) from Product as product";
		Query query =  this.getSessionFactory().getCurrentSession().createQuery(sql);
		return Integer.parseInt(String.valueOf(query.uniqueResult())); 
	}

	public List findAllTitle() {
		// TODO Auto-generated method stub
		log.debug("finding all News title instances");
		try {
			String queryString = "select title from News";
		 	return getHibernateTemplate().find(queryString);
		} catch (RuntimeException re) {
			log.error("find all title  failed", re);
			throw re;
		}
	}
}